linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * PCI Hot Plug Controller Driver for System z

 *

 * Copyright 2012 IBM Corp.

 *

 * Author(s):

 *   Jan Glauber <jang@linux.vnet.ibm.com>

 */

​

#define KMSG_COMPONENT "zpci"

#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

​

#include <linux/kernel.h>

#include <linux/slab.h>

#include <linux/pci.h>

#include <linux/pci_hotplug.h>

#include <asm/pci_debug.h>

#include <asm/sclp.h>

​

#define SLOT_NAME_SIZE  10

static LIST_HEAD(s390_hotplug_slot_list);

​

static int zpci_fn_configured(enum zpci_state state)

{

    return state == ZPCI_FN_STATE_CONFIGURED ||

           state == ZPCI_FN_STATE_ONLINE;

}

​

/*

 * struct slot - slot information for each *physical* slot

 */

struct slot {

    struct list_head slot_list;

    struct hotplug_slot hotplug_slot;

    struct zpci_dev *zdev;

};

​

static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot)

{

    return container_of(hotplug_slot, struct slot, hotplug_slot);

}

​

static inline int slot_configure(struct slot *slot)

{

    int ret = sclp_pci_configure(slot->zdev->fid);

​

    zpci_dbg(3, "conf fid:%x, rc:%d\n", slot->zdev->fid, ret);

    if (!ret)

        slot->zdev->state = ZPCI_FN_STATE_CONFIGURED;

​

    return ret;

}

​

static inline int slot_deconfigure(struct slot *slot)

{

    int ret = sclp_pci_deconfigure(slot->zdev->fid);

​

    zpci_dbg(3, "deconf fid:%x, rc:%d\n", slot->zdev->fid, ret);

    if (!ret)

        slot->zdev->state = ZPCI_FN_STATE_STANDBY;

​

    return ret;